Trade and contractor licensing covers the regulated skilled trades — general contracting, electrical work, plumbing, HVAC, roofing, and specialty contracting. In most US states, performing trade work without the appropriate license is a criminal offense, and unlicensed contractors are barred from filing mechanics' liens or enforcing contracts. The licensing model is exam- and experience-based: you typically need documented years of journeyman-level experience plus a passing score on a state trade exam.
Costs in this category range from roughly $200 for a basic specialty-contractor license to $3,000+ for a full general-contractor license with surety bond and insurance. Processing time is bounded by the exam schedule and FBI background check — plan on 8–16 weeks from application to license issuance, with the exam preparation typically representing the rate-limiting step for first-time applicants.
Updated as of May 2026| License type | Typical cost | Renewal | Processing |
|---|---|---|---|
| Plumbing License | $200–$1500 | 3-5 years | 2-8 weeks |
| Electrical License | $200–$1500 | 3-5 years | 2-8 weeks |
| HVAC License | $150–$1200 | 3-5 years | 2-6 weeks |
Required to design, install, or repair plumbing systems. Typically requires apprenticeship, classroom hours, and state examination…
$200–$1500 · 2-8 weeksRequired to install, repair, or maintain electrical systems. Involves extensive apprenticeship and demonstration of code knowledge…
$200–$1500 · 2-8 weeksRequired to install, repair, or maintain heating, ventilation, and air conditioning systems. Requires technical certification and …
$150–$1200 · 2-6 weeksContractor licensing is regulated almost entirely at the state level by a Contractors State License Board (CSLB) or equivalent. The state grants the actual license; cities and counties layer on local registration requirements and permit fees on top of that state license. There's no federal contractor license — though federal contracting (work on federal projects) requires SAM.gov registration and often DBE/SBA certification on top of state licensing.
Most states classify contractors into tiers by dollar limit: a Class A or general-contractor license covers projects of any size; Class B covers commercial projects under a certain threshold; Class C and specialty licenses cover specific trades (electrical, plumbing, HVAC, roofing). The exam, experience, and bond requirements scale with the license tier.
Surety bonds are a defining feature of this category. Almost every state requires contractors to post a license bond (typically $10,000–$25,000) before the license is issued. The bond doesn't insure the contractor — it protects consumers in the event of unfinished work or code violations. Bonds are not paid out of pocket; they're underwritten annually for a small percentage of the bond amount.
Jump straight to the city-level guide for the most popular trades license in each city (Plumbing License):
In most US states, yes — for any project above a dollar threshold (commonly $500 or $1,000 in total project value), and for any work that requires a building permit (structural, electrical, plumbing). A handful of states have higher thresholds or carve-outs for "handyman" work, but you should always check your state's specific rules before bidding.
Plan on 8–16 weeks from application to license-in-hand for first-time applicants. The bottleneck is typically the state contractor exam — schedule it as soon as your application is accepted, because exam slots often book 4–6 weeks out. The FBI background check runs in parallel and takes 4–8 weeks.
Total upfront cost is typically $1,500–$3,000 for a first-time general contractor license, broken down as: application fees ($200–$400), exam fees ($100–$300), surety bond premium ($150–$500/year on a $15,000 bond), liability insurance ($500–$1,500/year minimum), and license issuance ($200–$400). Specialty trade licenses run lower — typically $500–$1,500 all-in.
A contractor license bond is a three-party agreement between you, the surety company, and the state, where the surety guarantees a fixed dollar amount (commonly $10,000–$25,000) is available to compensate consumers if you fail to complete a job or violate code. You pay an annual premium (typically 1–3% of the bond amount) and the bond stays in place as long as your license is active.
In most states, no — contractor licensing requires 2–4 years of documented experience working under a licensed contractor before you can sit for the state exam. A few states allow you to substitute formal trade-school education for some of the experience requirement, and a few accept military experience for trades like electrical or HVAC. Check your state's specific requirements before applying.
Always confirm current trades-licensing fees and requirements directly with the issuing authority before filing. Use these starting points: